Motion in A Plane

Question: For a given velocity, a projectile has the same range R for two angles of projection if $t_1$ and $t_2$ are the times of flight in the two cases then

1) ${t_1}{t_2} \propto \,{R^2}$

2) ${t_1}{t_2} \propto \,R$

3) ${t_1}{t_2} \propto \,\frac{1}{R}$

4) ${t_1}{t_2} \propto \,\frac{1}{{{R^2}}}$

Solution:

Explanation: Explanation

oblique-projectile-motion

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